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Slow cooker sausage casserole over mashed potatoes with mushrooms and peppers.

Slow Cooker Sausage Casserole: The Ultimate Comfort Food

Slow Cooker Sausage Casserole! A perfect blend of succulent pork sausages, aromatic herbs, and nourishing vegetables. This easy dinner recipe is a cosy, home-cooked meal with minimal fuss. Ideal for both weekday dinners and weekend get-togethers.
5 from 3 votes
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Course: Easy Dinner
Cuisine: American/ British
Prep Time: 15 minutes
Cook Time: 5 hours
Total Time: 5 hours 15 minutes
Servings: 6 people
Author: Deborah Rainford

Ingredients

  • 8-10 thick-cut pork sausages *see notes
  • 1 red onion, cut in half and thinly sliced
  • 2 cloves garlic, minced *see notes
  • 2 red bell peppers, deseeded and chopped
  • 120 g brown, chestnut mushrooms, chopped *see notes
  • 2 teaspoons mixed dried herbs *see notes
  • 1 tablespoon tomato puree
  • 1 x 400g tin chopped tomatoes
  • 1 tablespoon Worcestershire sauce
  • 400-500 ml beef stock made with a stock cube
  • Salt and pepper to taste
  • Optional: 1 x 400g tin cannellini beans or navy beans, drained

Instructions

  • Brown the Sausages: Heat a tablespoon of oil over medium heat in a frying pan. Add sausages and brown on all sides. Move browned sausages to the slow cooker. *This is an optional step but enhances the sausage flavours.
  • Prepare Vegetables: Thinly slice the red onion, mince the garlic, and chop the red bell peppers and mushrooms. Add the vegetables to the slow cooker.
  • Wet Ingredients: Add tomato puree, tinned tomatoes, Worcestershire sauce, and beef stock into the slow cooker. Mix well.
  • Season: Add mixed dried herbs, salt, and pepper. Stir to combine all ingredients.
  • Slow Cook: Cover and set the slow cooker on low for 6-8 hours or on high for 4-5 hours.
  • Optional: If using, add cannellini or navy beans 30 minutes before cooking is complete. Stir well.
  • Serve: Stir the casserole well, taste and adjust the seasoning before serving. Serve over mashed potatoes.

Notes

  • Sausages: Cumberland or Lincolnshire are the preferred choice, but you can substitute with pork and apple or Italian-style sausages.
  • Garlic: Fresh minced garlic can be replaced with garlic paste.
  • Mushrooms: White closed-cup mushrooms are fine here too. They just lack the depth of flavour that brown mushrooms have. Pre-sliced mushrooms are a time-saving option here if you need it.
  • Herbs: Mixed dried herbs can be replaced with dried thyme.

Nutrition

Calories: 573kcal | Carbohydrates: 24g | Protein: 27g | Fat: 41g | Saturated Fat: 13g | Polyunsaturated Fat: 6g | Monounsaturated Fat: 18g | Trans Fat: 0.3g | Cholesterol: 108mg | Sodium: 1232mg | Potassium: 830mg | Fiber: 3g | Sugar: 5g | Vitamin A: 1452IU | Vitamin C: 61mg | Calcium: 59mg | Iron: 3mg
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